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RTextView.m
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RTextView.m
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/*
* R.app : a Cocoa front end to: "R A Computer Language for Statistical Data Analysis"
*
* R.app Copyright notes:
* Copyright (C) 2004-5 The R Foundation
* written by Stefano M. Iacus and Simon Urbanek
*
*
* R Copyright notes:
* Copyright (C) 1995-1996 Robert Gentleman and Ross Ihaka
* Copyright (C) 1998-2001 The R Development Core Team
* Copyright (C) 2002-2004 The R Foundation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* A copy of the GNU General Public License is available via WWW at
* http://www.gnu.org/copyleft/gpl.html. You can also obtain it by
* writing to the Free Software Foundation, Inc., 59 Temple Place,
* Suite 330, Boston, MA 02111-1307 USA.
*
* Created by Simon Urbanek on 5/11/05.
* $Id: RTextView.m 7927 2021-02-12 02:19:59Z urbaneks $
*/
#import "RTextView.h"
#import "HelpManager.h"
#import "RGUI.h"
#import "RegexKitLite.h"
#import "RController.h"
#import "NSTextView_RAdditions.h"
#import "RDocumentWinCtrl.h"
#import "NSString_RAdditions.h"
// linked character attributes
#define kTALinked @"link"
#define kTAVal @"x"
// some helper functions for handling rectangles and points
// needed in roundedBezierPathAroundRange:
static inline CGFloat RRectTop(NSRect rectangle) { return rectangle.origin.y; }
static inline CGFloat RRectBottom(NSRect rectangle) { return rectangle.origin.y+rectangle.size.height; }
static inline CGFloat RRectLeft(NSRect rectangle) { return rectangle.origin.x; }
static inline CGFloat RRectRight(NSRect rectangle) { return rectangle.origin.x+rectangle.size.width; }
static inline CGFloat RPointDistance(NSPoint a, NSPoint b) { return sqrtf( (a.x-b.x)*(a.x-b.x) + (a.y-b.y)*(a.y-b.y) ); }
static inline NSPoint RPointOnLine(NSPoint a, NSPoint b, CGFloat t) { return NSMakePoint(a.x*(1.0f-t) + b.x*t, a.y*(1.0f-t) + b.y*t); }
// declared external
BOOL RTextView_autoCloseBrackets = YES;
#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_7
// declare the following methods to avoid compiler warnings
@interface NSTextView (SuppressWarnings)
- (void)swipeWithEvent:(NSEvent *)event;
- (void)setAutomaticTextReplacementEnabled:(BOOL)flag;
- (void)setAutomaticSpellingCorrectionEnabled:(BOOL)flag;
- (void)setAutomaticDataDetectionEnabled:(BOOL)flag;
- (void)setAutomaticDashSubstitutionEnabled:(BOOL)flag;
@end
#endif
#pragma mark -
#pragma mark Private API
@interface RTextView (Private)
- (void)selectMatchingPairAt:(NSInteger)position;
- (NSString*)functionNameForCurrentScope;
@end
#pragma mark -
@implementation RTextView
- (id) initWithCoder: (NSCoder*) coder
{
self = [super initWithCoder:coder];
if (self) {
separatingTokensSet = [[NSCharacterSet characterSetWithCharactersInString: @"()'\"+-=/* ,\t]{}^|&!;<>?`\n\\"] retain];
undoBreakTokensSet = [[NSCharacterSet characterSetWithCharactersInString: @"+- .,|&*/:!?<>=\n"] retain];
wordCharSet = [NSMutableCharacterSet alphanumericCharacterSet];
[wordCharSet addCharactersInString:@"_.\\"];
[wordCharSet retain];
}
return self;
}
- (void)awakeFromNib
{
SLog(@"RTextView: awakeFromNib %@", self);
// commentTokensSet = [[NSCharacterSet characterSetWithCharactersInString: @"#"] retain];
console = NO;
RTextView_autoCloseBrackets = YES;
SLog(@" - delegate: %@", [self delegate]);
isRdDocument = NO;
if([[self window] windowController] && [[[self window] windowController] respondsToSelector:@selector(isRdDocument)])
isRdDocument = ([[[self window] windowController] isRdDocument]);
// work-arounds for brain-dead "features" in Lion
if ([self respondsToSelector:@selector(setAutomaticQuoteSubstitutionEnabled:)])
[self setAutomaticQuoteSubstitutionEnabled:NO];
if ([self respondsToSelector:@selector(setAutomaticTextReplacementEnabled:)])
[self setAutomaticTextReplacementEnabled:NO];
if ([self respondsToSelector:@selector(setAutomaticSpellingCorrectionEnabled:)])
[self setAutomaticSpellingCorrectionEnabled:NO];
if ([self respondsToSelector:@selector(setAutomaticLinkDetectionEnabled:)])
[self setAutomaticLinkDetectionEnabled:NO];
if ([self respondsToSelector:@selector(setAutomaticDataDetectionEnabled:)])
[self setAutomaticDataDetectionEnabled:NO];
if ([self respondsToSelector:@selector(setAutomaticDashSubstitutionEnabled:)])
[self setAutomaticDashSubstitutionEnabled:NO];
[self endSnippetSession];
}
- (void)dealloc
{
if(separatingTokensSet) [separatingTokensSet release];
if(undoBreakTokensSet) [undoBreakTokensSet release];
if(wordCharSet) [wordCharSet release];
// if(commentTokensSet) [commentTokensSet release];
[super dealloc];
}
- (BOOL)acceptsFirstResponder
{
// Close sharedColorPanel if visible to avoid color changes
if([[NSColorPanel sharedColorPanel] isVisible])
[[NSColorPanel sharedColorPanel] close];
return YES;
}
- (NSBezierPath*)roundedBezierPathAroundRange:(NSRange)aRange
{
// This method was modified taken from the open source project "Sequel Pro"
// http://www.sequelpro.com
//
// which follows the
// GNU GENERAL PUBLIC LICENSE
// http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
//
// more details:
// http://www.sequelpro.com/legal/
// http://www.sequelpro.com/developers/
// parameters for snippet highlighting
CGFloat kappa = 0.5522847498f; // magic number from http://www.whizkidtech.redprince.net/bezier/circle/
CGFloat radius = 6;
CGFloat horzInset = -3;
CGFloat vertInset = 0.3f;
BOOL connectDisconnectedPartsWithLine = NO;
NSBezierPath *framePath = [NSBezierPath bezierPath];
NSUInteger rectCount;
NSRectArray rects = [[self layoutManager] rectArrayForCharacterRange: aRange
withinSelectedCharacterRange: aRange
inTextContainer: [self textContainer]
rectCount: &rectCount ];
if (rectCount>2 || (rectCount>1 && (RRectRight(rects[1]) >= RRectLeft(rects[0]) || connectDisconnectedPartsWithLine))) {
// highlight complicated multiline snippet
NSRect lineRects[4];
lineRects[0] = rects[0];
lineRects[1] = rects[1];
lineRects[2] = rects[rectCount-2];
lineRects[3] = rects[rectCount-1];
for(int j=0;j<4;j++) lineRects[j] = NSInsetRect(lineRects[j], horzInset, vertInset);
NSPoint vertices[8];
vertices[0] = NSMakePoint( RRectLeft(lineRects[0]), RRectTop(lineRects[0]) ); // point a
vertices[1] = NSMakePoint( RRectRight(lineRects[0]), RRectTop(lineRects[0]) ); // point b
vertices[2] = NSMakePoint( RRectRight(lineRects[2]), RRectBottom(lineRects[2]) ); // point c
vertices[3] = NSMakePoint( RRectRight(lineRects[3]), RRectBottom(lineRects[2]) ); // point d
vertices[4] = NSMakePoint( RRectRight(lineRects[3]), RRectBottom(lineRects[3]) ); // point e
vertices[5] = NSMakePoint( RRectLeft(lineRects[3]), RRectBottom(lineRects[3]) ); // point f
vertices[6] = NSMakePoint( RRectLeft(lineRects[1]), RRectTop(lineRects[1]) ); // point g
vertices[7] = NSMakePoint( RRectLeft(lineRects[0]), RRectTop(lineRects[1]) ); // point h
for (NSUInteger j=0; j<8; j++) {
NSPoint curr = vertices[j];
NSPoint prev = vertices[(j+8-1)%8];
NSPoint next = vertices[(j+1)%8];
CGFloat s = radius/RPointDistance(prev, curr);
if (s>0.5) s = 0.5f;
CGFloat t = radius/RPointDistance(curr, next);
if (t>0.5) t = 0.5f;
NSPoint a = RPointOnLine(curr, prev, 0.5f);
NSPoint b = RPointOnLine(curr, prev, s);
NSPoint c = curr;
NSPoint d = RPointOnLine(curr, next, t);
NSPoint e = RPointOnLine(curr, next, 0.5f);
if (j==0) [framePath moveToPoint:a];
[framePath lineToPoint: b];
[framePath curveToPoint:d controlPoint1:RPointOnLine(b, c, kappa) controlPoint2:RPointOnLine(d, c, kappa)];
[framePath lineToPoint: e];
}
} else {
//highlight disconnected snippet parts (or single line snippet)
for (NSUInteger j=0; j<rectCount; j++) {
NSRect rect = rects[j];
rect = NSInsetRect(rect, horzInset, vertInset);
[framePath appendBezierPathWithRoundedRect:rect xRadius:radius yRadius:radius];
}
}
return framePath;
}
- (void)drawRect:(NSRect)rect {
// Draw background only for screen display but not while printing
if([NSGraphicsContext currentContextDrawingToScreen]) {
// Draw textview's background since due to the snippet highlighting we're responsible for it.
NSColor *bgColor = [NSColor clearColor];
NSColor *frameColor = [NSColor clearColor];
if([[self delegate] isKindOfClass:[RController class]])
frameColor = [Preferences unarchivedObjectForKey:selectionColorKey withDefault:[NSColor colorWithCalibratedRed:0.71f green:0.835f blue:1.0f alpha:1.0f]];
else
frameColor = [Preferences unarchivedObjectForKey:editorSelectionBackgroundColorKey withDefault:[NSColor colorWithCalibratedRed:0.71f green:0.835f blue:1.0f alpha:1.0f]];
bgColor = [frameColor colorWithAlphaComponent:0.4];
// Highlight snippets
if(snippetControlCounter > -1) {
// Is the caret still inside a snippet
if([self checkForCaretInsideSnippet]) {
for(NSInteger i=0; i<snippetControlMax; i++) {
if(snippetControlArray[i][0] > -1) {
// choose the colors for the snippet parts
if(i == currentSnippetIndex) {
[bgColor setFill];
[frameColor setStroke];
} else {
[bgColor setFill];
[frameColor setStroke];
}
NSBezierPath *snippetPath = [self roundedBezierPathAroundRange: NSMakeRange(snippetControlArray[i][0],snippetControlArray[i][1]) ];
[snippetPath fill];
[snippetPath stroke];
}
}
} else {
[self endSnippetSession];
}
}
}
[super drawRect:rect];
}
- (void)keyDown:(NSEvent *)theEvent
{
if(![self isEditable]) {
[super keyDown:theEvent];
return;
}
NSString *rc = [theEvent charactersIgnoringModifiers];
NSString *cc = [theEvent characters];
unsigned long modFlags = [theEvent modifierFlags];
long allFlags = (NSShiftKeyMask|NSControlKeyMask|NSAlternateKeyMask|NSCommandKeyMask);
long curFlags = (modFlags & allFlags);
BOOL hilite = NO;
SLog(@"RTextView: keyDown: %@ *** \"%@\" %lx", theEvent, rc, modFlags);
if([rc length] && [undoBreakTokensSet characterIsMember:[rc characterAtIndex:0]]) [self breakUndoCoalescing];
if ([rc isEqual:@"."] && (modFlags&allFlags)==NSControlKeyMask) {
SLog(@" - send complete: to self");
[self complete:self];
return;
}
if ([rc isEqual:@"="]) {
long mf = modFlags & allFlags;
if ( mf ==NSControlKeyMask) {
[self breakUndoCoalescing];
[self insertText:@"<-"];
return;
}
if ( mf == NSAlternateKeyMask ) {
[self breakUndoCoalescing];
[self insertText:@"!="];
return;
}
}
if ([rc isEqual:@"-"] && (modFlags&allFlags)==NSAlternateKeyMask) {
[self breakUndoCoalescing];
[self insertText:[NSString stringWithFormat:@"%@<- ",
([self selectedRange].location && [[self string] characterAtIndex:[self selectedRange].location-1] != ' ')?@" ":@""]];
return;
}
if ([rc isEqual:@"h"] && (modFlags&allFlags)==NSControlKeyMask) {
SLog(@" - send showHelpForCurrentFunction to self");
[self showHelpForCurrentFunction];
return;
}
// Detect if matching bracket should be highlighted
if(cc && [cc length]==1 && [[[NSUserDefaults standardUserDefaults] objectForKey:showBraceHighlightingKey] isEqualToString:@"YES"]) {
switch([cc characterAtIndex:0]) {
case '(':
case '[':
case '{':
case ')':
case ']':
case '}':
hilite = YES;
}
}
if (cc && [cc length]==1 && [[[NSUserDefaults standardUserDefaults] objectForKey:kAutoCloseBrackets] isEqualToString:@"YES"]) {
unichar ck = [cc characterAtIndex:0];
NSString *complement = nil;
NSRange r = [self selectedRange];
BOOL acCheck = NO;
switch (ck) {
case '{':
complement = @"}";
case '(':
if (!complement) complement = @")";
case '[':
if (!complement) complement = @"]";
case '"':
if (!complement) {
complement = @"\"";
acCheck = YES;
if ([self parserContextForPosition:r.location] != pcExpression) break;
}
case '`':
if (!complement) {
complement = @"`";
acCheck = YES;
if ([self parserContextForPosition:r.location] != pcExpression) break;
}
case '\'':
if (!complement) {
complement = @"\'";
acCheck = YES;
if ([self parserContextForPosition:r.location] != pcExpression) break;
}
// Check if something is selected and wrap it into matching pair characters and preserve the selection
// - in RConsole only if selection is in the last line
if(((([self isRConsole] && ([[self string] lineRangeForRange:NSMakeRange([[self string] length]-1,0)].location+1 < r.location)) || ![self isRConsole]))
&& [self wrapSelectionWithPrefix:[NSString stringWithFormat:@"%c", ck] suffix:complement]) {
SLog(@"RTextView: selection was wrapped with auto-pairs");
return;
}
// Try to suppress unnecessary auto-pairing
if( !isRdDocument && [self isCursorAdjacentToAlphanumCharWithInsertionOf:ck] && ![self isNextCharMarkedBy:kTALinked withValue:kTAVal] && ![self selectedRange].length ){
SLog(@"RTextView: suppressed auto-pairing");
[super keyDown:theEvent];
if(hilite && [[self delegate] respondsToSelector:@selector(highlightBracesWithShift:andWarn:)])
[(id)[self delegate] highlightBracesWithShift:-1 andWarn:YES];
return;
}
SLog(@"RTextView: open bracket chracter %c", ck);
[super keyDown:theEvent];
{
r = [self selectedRange];
if (r.location != NSNotFound) {
// NSAttributedString *as = [[NSAttributedString alloc] initWithString:complement attributes:
// [NSDictionary dictionaryWithObject:TAVal forKey:kTALinked]];
NSTextStorage *ts = [self textStorage];
// Register the auto-pairing for undo and insert the complement
[self shouldChangeTextInRange:r replacementString:complement];
[self replaceCharactersInRange:r withString:complement];
r.length=1;
[ts addAttribute:kTALinked value:kTAVal range:r];
r.length=0;
[self setSelectedRange:r];
}
return;
}
case '}':
case ')':
case ']':
acCheck = YES;
}
if (acCheck) {
NSRange r = [self selectedRange];
if (r.location != NSNotFound && r.length == 0) {
NSTextStorage *ts = [self textStorage];
id attr = nil;
@try {
attr = [ts attribute:kTALinked atIndex:r.location effectiveRange:0];
}
@catch (id ue) {}
if (attr) {
unsigned int cuc = [[ts string] characterAtIndex:r.location];
SLog(@"RTextView: encountered linked character '%c', while writing '%c'", cuc, ck);
if (cuc == ck) {
r.length = 1;
SLog(@"RTextView: selecting linked character for removal on type");
[self setSelectedRange:r];
}
}
}
SLog(@"RTextView: closing bracket chracter %c", ck);
}
}
// Check for {SHIFT}TAB to try to insert snippet via TAB trigger
// or if snippet mode select next/prev snippet
if ([theEvent keyCode] == 48 && [self isEditable]){
NSRange targetRange = [self getRangeForCurrentWord];
NSString *tabTrigger = [[self string] substringWithRange:targetRange];
// Is TAB trigger active change selection according to {SHIFT}TAB
if(snippetControlCounter > -1){
if(curFlags==(NSShiftKeyMask)) { // select previous snippet
currentSnippetIndex--;
// Look for previous defined snippet since snippet numbers must not serial like 1, 5, and 12 e.g.
while(snippetControlArray[currentSnippetIndex][0] == -1 && currentSnippetIndex > -2)
currentSnippetIndex--;
if(currentSnippetIndex < 0) {
currentSnippetIndex = 0;
while(snippetControlArray[currentSnippetIndex][0] == -1 && currentSnippetIndex < 20)
currentSnippetIndex++;
NSBeep();
}
[self selectCurrentSnippet];
return;
} else { // select next snippet
currentSnippetIndex++;
// Look for next defined snippet since snippet numbers must not serial like 1, 5, and 12 e.g.
while(snippetControlArray[currentSnippetIndex][0] == -1 && currentSnippetIndex < 20)
currentSnippetIndex++;
if(currentSnippetIndex > snippetControlMax) { // for safety reasons
[self endSnippetSession];
} else {
[self selectCurrentSnippet];
return;
}
}
[self endSnippetSession];
return;
}
// Check if tab trigger is defined; if so insert it, otherwise pass through event
if(snippetControlCounter < 0 && [tabTrigger length]) {
// TODO will come soon [HJBB]
[super keyDown:theEvent];
return;
}
}
[super keyDown:theEvent];
if(hilite && [[self delegate] respondsToSelector:@selector(highlightBracesWithShift:andWarn:)])
[(id)[self delegate] highlightBracesWithShift:-1 andWarn:YES];
}
- (void)deleteBackward:(id)sender
{
NSRange r = [self selectedRange];
if (r.length == 0 && r.location > 0)
[self selectMatchingPairAt:r.location];
[super deleteBackward:sender];
}
- (void)deleteForward:(id)sender
{
NSRange r = [self selectedRange];
if (r.length == 0)
[self selectMatchingPairAt:r.location + 1];
[super deleteForward:sender];
}
/**
* If the textview has a selection, wrap it with the supplied prefix and suffix strings;
* return whether or not any wrap was performed.
*/
- (BOOL) wrapSelectionWithPrefix:(NSString *)prefix suffix:(NSString *)suffix
{
NSRange currentRange = [self selectedRange];
// Only proceed if a selection is active
if (currentRange.length == 0 || ![self isEditable])
return NO;
NSString *selString = [[self string] substringWithRange:currentRange];
// Replace the current selection with the selected string wrapped in prefix and suffix
[self insertText:[NSString stringWithFormat:@"%@%@%@", prefix, selString, suffix]];
// Re-select original selection
NSRange innerSelectionRange = NSMakeRange(currentRange.location+1, [selString length]);
[self setSelectedRange:innerSelectionRange];
// Mark last autopair character as autopair-linked
[[self textStorage] addAttribute:kTALinked value:kTAVal range:NSMakeRange(NSMaxRange(innerSelectionRange), 1)];
return YES;
}
/**
* Returns the parser context for the passed cursor position
*
* @param position The cursor position to test
*/
- (int)parserContextForPosition:(NSInteger)position
{
int context = pcExpression;
if (position < 1)
return context;
CFStringRef string = (CFStringRef)[self string];
if (position > [[self string] length])
position = [[self string] length];
// NSRange thisLine = [string lineRangeForRange:NSMakeRange(position, 0)];
CFIndex lineStart;
CFStringGetLineBounds(string, CFRangeMake(position, 0), &lineStart, NULL, NULL);
// we do NOT support multi-line strings, so the line always starts as an expression
if (lineStart == position)
return context;
SLog(@"RTextView: parserContextForPosition: %ld, line start: %ld", (long)position, (long)lineStart);
long i = lineStart;
BOOL skip = NO;
unichar c;
unichar commentSign = (isRdDocument) ? '%' : '#';
while (i < position) {
c = CFStringGetCharacterAtIndex(string, i);
if (skip) {
skip = NO;
} else {
if (c == '\\' && (context < pcComment)) {
skip = YES;
}
else if (c == '"') {
if (context == pcStringDQ)
context = pcExpression;
else if (context == pcExpression)
context = pcStringDQ;
}
else if (c == '\'') {
if (context == pcStringSQ)
context = pcExpression;
else if (context == pcExpression)
context = pcStringSQ;
}
else if (c == '`') {
if (context == pcStringBQ)
context = pcExpression;
else if (context == pcExpression)
context = pcStringBQ;
}
else if(context == pcExpression) {
if(c == commentSign)
context = pcComment;
}
}
i++;
}
return context;
}
/**
* Returns the range for user completion
*/
- (NSRange)rangeForUserCompletion
{
NSRange userRange = NSMakeRange(NSNotFound, 0);
NSRange selection = [self selectedRange];
NSString *string = [self string];
int cursor = NSMaxRange(selection); // we complete at the end of the selection
int context = [self parserContextForPosition:cursor];
SLog(@"RTextView: rangeForUserCompletion: parser context: %d", context);
if (context == pcComment) return NSMakeRange(NSNotFound,0); // no completion in comments
if (context == pcStringDQ || context == pcStringSQ) // we're in a string, hence file completion
// the beginning of the range doesn't matter, because we're guaranteed to find a string separator on the same line
userRange = [string rangeOfCharacterFromSet:[NSCharacterSet characterSetWithCharactersInString:(context == pcStringDQ) ? @"\" /" : @"' /"]
options:NSBackwardsSearch|NSLiteralSearch
range:NSMakeRange(0, selection.location)];
if (context == pcExpression || context == pcStringBQ) // we're in an expression or back-quote, so use R separating tokens (we could be smarter about the BQ but well..)
userRange = [string rangeOfCharacterFromSet:separatingTokensSet
options:NSBackwardsSearch|NSLiteralSearch
range:NSMakeRange(0, selection.location)];
if( userRange.location == NSNotFound )
// everything is one expression - we're guaranteed to be in the first line (because \n would match)
return NSMakeRange(0, cursor);
if( userRange.length < 1 ) // nothing to complete
return NSMakeRange(NSNotFound, 0);
if( userRange.location == selection.location - 1 ) { // just before cursor means empty completion
userRange.location++;
userRange.length = 0;
} else { // normal completion
userRange.location++; // skip past first bad one
userRange.length = selection.location - userRange.location;
SLog(@" - returned range: %ld:%ld", userRange.location, userRange.length);
// FIXME: do we really need to change it? Cocoa should be doing it .. (and does in Lion)
if (os_version < 11.0)
[self setSelectedRange:userRange];
}
return userRange;
}
/**
* Checks if the char after the current caret position/selection matches a supplied attribute
*/
- (BOOL) isNextCharMarkedBy:(id)attribute withValue:(id)aValue
{
NSUInteger caretPosition = [self selectedRange].location;
// Perform bounds checking
if (caretPosition >= [[self string] length]) return NO;
// Perform the check
if ([[[self textStorage] attribute:attribute atIndex:caretPosition effectiveRange:nil] isEqualToString:aValue])
return YES;
return NO;
}
/**
* Checks if the caret adjoins to an alphanumeric char |word or word| or wo|rd
* Exception for word| and char is a “(” or “[” to allow e.g. auto-pairing () for functions
*/
- (BOOL) isCursorAdjacentToAlphanumCharWithInsertionOf:(unichar)aChar
{
NSUInteger caretPosition = [self selectedRange].location;
NSCharacterSet *alphanum = [NSCharacterSet alphanumericCharacterSet];
BOOL leftIsAlphanum = NO;
BOOL rightIsAlphanum = NO;
BOOL charIsOpenBracket = (aChar == '(' || aChar == '[');
NSUInteger bufferLength = [[self string] length];
if(!bufferLength) return NO;
// Check previous/next character for being alphanum
// @try block for bounds checking
@try
{
if(caretPosition==0)
leftIsAlphanum = NO;
else
leftIsAlphanum = [alphanum characterIsMember:[[self string] characterAtIndex:caretPosition-1]] && !charIsOpenBracket;
} @catch(id ae) { }
@try {
if(caretPosition >= bufferLength)
rightIsAlphanum = NO;
else
rightIsAlphanum= [alphanum characterIsMember:[[self string] characterAtIndex:caretPosition]];
} @catch(id ae) { }
return (leftIsAlphanum ^ rightIsAlphanum || (leftIsAlphanum && rightIsAlphanum));
}
/**
* Sets the console mode
*
* @param isConsole If self is in console mode (YES) or not (NO)
*/
- (void)setConsoleMode:(BOOL)isConsole
{
console = isConsole;
SLog(@"RTextView: set console flag to %@ (%@)", isConsole?@"yes":@"no", self);
}
/**
* Shows the Help page for the current function relative to the current cursor position or
* if something is selected for the selection in the HelpManager
*
* Notes:
* - if the cursor is in between or adjacent to an alphanumeric word take this one if it not a pure numeric value
* - if nothing found try to parse backwards from cursor position to find the active function name according to opened and closed parentheses
* examples | := cursor
* a(b(1,2|,3)) -> b
* a(b(1,2,3)|) -> a
* - if nothing found set the input focus to the Help search field either in RConsole or in R script editor
*/
- (void) showHelpForCurrentFunction
{
NSString *helpString = [self functionNameForCurrentScope];
if(helpString && [helpString length]) {
int oldSearchType = [[HelpManager sharedController] searchType];
[[HelpManager sharedController] setSearchType:kExactMatch];
[[HelpManager sharedController] showHelpFor:helpString];
[[HelpManager sharedController] setSearchType:oldSearchType];
return;
}
id aSearchField = nil;
NSWindow *keyWin = [NSApp keyWindow];
if(![[keyWin toolbar] isVisible])
[keyWin toggleToolbarShown:nil];
if([[self delegate] respondsToSelector:@selector(searchToolbarView)])
aSearchField = [(id)[self delegate] searchToolbarView];
if(aSearchField == nil || ![aSearchField isKindOfClass:[NSSearchField class]]) return;
[aSearchField setStringValue:[[self string] substringWithRange:[self getRangeForCurrentWord]]];
if([[aSearchField stringValue] length])
[[HelpManager sharedController] showHelpFor:[aSearchField stringValue]];
else
[[NSApp keyWindow] makeFirstResponder:aSearchField];
}
- (void)currentFunctionHint
{
NSString *helpString = [self functionNameForCurrentScope];
if(helpString && ![helpString isMatchedByRegex:@"(?s)[\\s\\[\\]\\(\\)\\{\\};\\?!]"] && [[self delegate] respondsToSelector:@selector(hintForFunction:)]) {
SLog(@"RTextView: currentFunctionHint for '%@'", helpString);
[(RController*)[self delegate] hintForFunction:helpString];
}
}
/**
* Shifts the selection, if any, rightwards by indenting any selected lines with one tab.
* If the caret is within a line, the selection is not changed after the index; if the selection
* has length, all lines crossed by the length are indented and fully selected.
* Returns whether or not an indentation was performed.
*/
- (BOOL) shiftSelectionRight
{
NSString *textViewString = [[self textStorage] string];
NSRange currentLineRange;
NSRange selectedRange = [self selectedRange];
if (selectedRange.location == NSNotFound || ![self isEditable]) return NO;
NSString *indentString = @"\t";
// if ([prefs soft]) {
// NSUInteger numberOfSpaces = [prefs soft width];
// if(numberOfSpaces < 1) numberOfSpaces = 1;
// if(numberOfSpaces > 32) numberOfSpaces = 32;
// NSMutableString *spaces = [NSMutableString string];
// for(NSUInteger i = 0; i < numberOfSpaces; i++)
// [spaces appendString:@" "];
// indentString = [NSString stringWithString:spaces];
// }
// Indent the currently selected line if the caret is within a single line
if (selectedRange.length == 0) {
// Extract the current line range based on the text caret
currentLineRange = [textViewString lineRangeForRange:selectedRange];
// Register the indent for undo
[self shouldChangeTextInRange:NSMakeRange(currentLineRange.location, 0) replacementString:indentString];
// Insert the new tab
[self replaceCharactersInRange:NSMakeRange(currentLineRange.location, 0) withString:indentString];
return YES;
}
// Otherwise, something is selected
NSRange firstLineRange = [textViewString lineRangeForRange:NSMakeRange(selectedRange.location,0)];
NSUInteger lastLineMaxRange = NSMaxRange([textViewString lineRangeForRange:NSMakeRange(NSMaxRange(selectedRange)-1,0)]);
// Expand selection for first and last line to begin and end resp. but not the last line ending
NSRange blockRange = NSMakeRange(firstLineRange.location, lastLineMaxRange - firstLineRange.location);
if([textViewString characterAtIndex:NSMaxRange(blockRange)-1] == '\n' || [textViewString characterAtIndex:NSMaxRange(blockRange)-1] == '\r')
blockRange.length--;
// Replace \n by \n\t of all lines in blockRange
NSString *newString;
// check for line ending
if([textViewString characterAtIndex:NSMaxRange(firstLineRange)-1] == '\r')
newString = [indentString stringByAppendingString:
[[textViewString substringWithRange:blockRange]
stringByReplacingOccurrencesOfString:@"\r" withString:[NSString stringWithFormat:@"\r%@", indentString]]];
else
newString = [indentString stringByAppendingString:
[[textViewString substringWithRange:blockRange]
stringByReplacingOccurrencesOfString:@"\n" withString:[NSString stringWithFormat:@"\n%@", indentString]]];
// Do insertion via insertText in order to ensure proper layouting
[self setSelectedRange:blockRange];
[self insertText:newString];
[self setSelectedRange:NSMakeRange(blockRange.location, [newString length])];
if(blockRange.length == [newString length])
return NO;
else
return YES;
}
/**
* Shifts the selection, if any, leftwards by un-indenting any selected lines by one tab if possible.
* If the caret is within a line, the selection is not changed after the undent; if the selection has
* length, all lines crossed by the length are un-indented and fully selected.
* Returns whether or not an indentation was performed.
*/
- (BOOL) shiftSelectionLeft
{
NSString *textViewString = [[self textStorage] string];
NSRange currentLineRange;
if ([self selectedRange].location == NSNotFound || ![self isEditable]) return NO;
// Undent the currently selected line if the caret is within a single line
if ([self selectedRange].length == 0) {
// Extract the current line range based on the text caret
currentLineRange = [textViewString lineRangeForRange:[self selectedRange]];
// Ensure that the line has length and that the first character is a tab
if (currentLineRange.length < 1
|| ([textViewString characterAtIndex:currentLineRange.location] != '\t' && [textViewString characterAtIndex:currentLineRange.location] != ' '))
return NO;
NSRange replaceRange;
// Check for soft indention
NSUInteger indentStringLength = 1;
// if ([prefs soft]) {
// NSUInteger numberOfSpaces = [prefs soft width];
// if(numberOfSpaces < 1) numberOfSpaces = 1;
// if(numberOfSpaces > 32) numberOfSpaces = 32;
// indentStringLength = numberOfSpaces;
// replaceRange = NSIntersectionRange(NSMakeRange(currentLineRange.location, indentStringLength), NSMakeRange(0,[[self string] length]));
// // Correct length for only white spaces
// NSString *possibleIndentString = [[[self textStorage] string] substringWithRange:replaceRange];
// NSUInteger numberOfLeadingWhiteSpaces = [possibleIndentString rangeOfRegex:@"^(\\s*)" capture:1L].length;
// if(numberOfLeadingWhiteSpaces == NSNotFound) numberOfLeadingWhiteSpaces = 0;
// replaceRange = NSMakeRange(currentLineRange.location, numberOfLeadingWhiteSpaces);
// } else {
replaceRange = NSMakeRange(currentLineRange.location, indentStringLength);
// }
// Register the undent for undo
[self shouldChangeTextInRange:replaceRange replacementString:@""];
// Remove the tab
[self replaceCharactersInRange:replaceRange withString:@""];
return YES;
}
// Otherwise, something is selected
NSRange firstLineRange = [textViewString lineRangeForRange:NSMakeRange([self selectedRange].location,0)];
NSUInteger lastLineMaxRange = NSMaxRange([textViewString lineRangeForRange:NSMakeRange(NSMaxRange([self selectedRange])-1,0)]);
// Expand selection for first and last line to begin and end resp. but the last line ending
NSRange blockRange = NSMakeRange(firstLineRange.location, lastLineMaxRange - firstLineRange.location);
if([textViewString characterAtIndex:NSMaxRange(blockRange)-1] == '\n' || [textViewString characterAtIndex:NSMaxRange(blockRange)-1] == '\r')
blockRange.length--;
// Check for soft or hard indention
NSString *indentString = @"\t";
NSUInteger indentStringLength = 1;
// if ([prefs soft]) {
// indentStringLength = [prefs soft width];
// if(indentStringLength < 1) indentStringLength = 1;
// if(indentStringLength > 32) indentStringLength = 32;
// NSMutableString *spaces = [NSMutableString string];
// for(NSUInteger i = 0; i < indentStringLength; i++)
// [spaces appendString:@" "];
// indentString = [NSString stringWithString:spaces];
// }
// Check if blockRange starts with SPACE or TAB
// (this also catches the first line of the entire text buffer or
// if only one line is selected)
NSInteger leading = 0;
if([textViewString characterAtIndex:blockRange.location] == ' '
|| [textViewString characterAtIndex:blockRange.location] == '\t')
leading += indentStringLength;
// Replace \n[ \t] by \n of all lines in blockRange
NSString *newString;
// check for line ending
if([textViewString characterAtIndex:NSMaxRange(firstLineRange)-1] == '\r')
newString = [[textViewString substringWithRange:NSMakeRange(blockRange.location+leading, blockRange.length-leading)]
stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"\r%@", indentString] withString:@"\r"];
else
newString = [[textViewString substringWithRange:NSMakeRange(blockRange.location+leading, blockRange.length-leading)]
stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"\n%@", indentString] withString:@"\n"];
// Do insertion via insertText in order to ensure proper layouting
[self setSelectedRange:blockRange];
[self insertText:newString];
[self setSelectedRange:NSMakeRange(blockRange.location, [newString length])];
if(blockRange.length == [newString length])
return NO;
else
return YES;
}
#pragma mark -
/**
* Selects matching pairs if the character before position and at position are linked
*
* @param position The cursor position to test
*/
- (void)selectMatchingPairAt:(NSInteger)position
{
if(position < 1 || position >= [[self string] length])
return;
unichar c = [[self string] characterAtIndex:position - 1];
unichar cc = 0;
switch (c) {
case '(': cc=')'; break;
case '{': cc='}'; break;
case '[': cc=']'; break;
case '"':
case '`':
case '\'':
cc=c; break;
}
if (cc) {
unichar cs = [[self string] characterAtIndex:position];
if (cs == cc) {
id attr = [[self textStorage] attribute:kTALinked atIndex:position effectiveRange:0];
if (attr) {
[self setSelectedRange:NSMakeRange(position - 1, 2)];
SLog(@"RTextView: selected matching pair");
}
}
}
}